Results 11 to 20 of about 139,198 (323)
The volume operator in covariant quantum gravity [PDF]
Classical and Quantum Gravity, 2010 A covariant spin-foam formulation of quantum gravity has been recently developed, characterized by a kinematics which appears to match well the one of canonical loop quantum gravity.
Alexandrov S +30 more
core +16 more sources
On Propagation in Loop Quantum Gravity [PDF]
Universe, 2022 A rigorous implementation of the Wheeler–Dewitt equations was derived in the context of Loop Quantum Gravity (LQG) and was coined Quantum Spin Dynamics (QSD). The Hamiltonian constraint of QSD was criticised as being too local and to prevent “propagation”
Thomas Thiemann, Madhavan Varadarajan
doaj +3 more sources
A short review of loop quantum gravity [PDF]
Reports on Progress in Physics, 2021 An outstanding open issue in our quest for physics beyond Einstein is the unification of general relativity (GR) and quantum physics. Loop quantum gravity (LQG) is a leading approach toward this goal.
A. Ashtekar, Eugenio Bianchi
semanticscholar +6 more sources
Loop quantum gravity’s boundary maps [PDF]
Classical and Quantum Gravity, 2021 In canonical quantum gravity, the presence of spatial boundaries naturally leads to boundary quantum states, representing quantum boundary conditions for the bulk fields.
Qiang Chen, E. Livine
semanticscholar +6 more sources
Matter in Loop Quantum Gravity [PDF]
Symmetry, Integrability and Geometry: Methods and Applications, 2012 Loop quantum gravity, a non-perturbative and manifestly background free, quantum theory of gravity implies that at the kinematical level the spatial geometry is discrete in a specific sense.
Ghanashyam Date, Golam Mortuza Hossain
doaj +5 more sources
Black holes in loop quantum gravity [PDF]
Reports on Progress in Physics, 2017 This is a review of results on black hole physics in the context of loop quantum gravity. The key feature underlying these results is the discreteness of geometric quantities at the Planck scale predicted by this approach to quantum gravity.
Alejandro Perez
semanticscholar +7 more sources
Loop quantum gravity and cosmological constant
Physics Letters B, 2021 A one-parameter regularization freedom of the Hamiltonian constraint for loop quantum gravity is analyzed. The corresponding spatially flat, homogenous and isotropic model includes the two well-known models of loop quantum cosmology as special cases. The
Xiangdong Zhang, Gaoping Long, Yongge Ma
doaj +4 more sources
Polyhedra in loop quantum gravity [PDF]
Physical Review D, 2011 Interwiners are the building blocks of spin-network states. The space of intertwiners is the quantization of a classical symplectic manifold introduced by Kapovich and Millson.
A. Ashtekar +19 more
core +4 more sources
The extended loop representation of quantum gravity [PDF]
Physical Review D, 1995 27 pages, report IFFC/94 ...
Rodolfo Gambini
+8 more sources
XIVth International Congress on Mathematical Physics, 2006 We describe the canonical approach to quantum gravity and report on the status of its most advanced implementation, Loop Quantum Gravity (LQG).
Alejandro Pérez
+9 more sources